Phase Regulation of Layered Perovskites toward High-Performance Light-Emitting Diodes

As a promising family of semiconductor materials for high-quality displays, quasi-2D perovskites have gained a significant amount of attention in the field of light-emitting diodes for their superior optoelectronic properties compared with their 3D counterparts. The intrinsic multiple-quantum-well characteristics induced by reducing the crystal dimensionality enable perovskite emitters to possess high photoluminescence quantum yield and good film morphology. It is demonstrated that the n-value distribution of quasi-2D perovskites, where n refers to the number of inorganic MX6 octahedron layers, has a strong impact on the electroluminescence efficiency and stability of perovskite light-emitting diodes (PeLEDs). In this review, the crystal structure of quasi-2D perovskites, the formation origin of different n-value distributions, and their optoelectronic characteristics are first introduced. Then, the mainstream strategies for regulating the phase distribution of layered perovskites are systematically reviewed to suggest their great significance in boosting the performances of PeLEDs. Lastly, the current deficiencies and potentially valuable research directions of phase distribution management for efficient and stable quasi-2D PeLEDs are provided. Quasi-2D perovskites are gaining increasing attention for their broad commercial prospect in high-definition displays due to their superior optoelectronic properties. This review expounds on the crystal structure, formation mechanism, and multiple-quantum-well characteristics of quasi-2D perovskites, which are followed by a comprehensive summary of the mainstream phase regulation strategies for high-performance PeLEDs.image

Automated summary

Quasi-2D perovskites have gained significant attention in high-quality displays for their superior optoelectronic properties compared to 3D counterparts. The n-value distribution of quasi-2D perovskites has a strong impact on the electroluminescence efficiency and stability of perovskite light-emitting diodes (PeLEDs). This review provides an introduction to the crystal structure, formation mechanism, and multiple-quantum-well characteristics of quasi-2D perovskites, as well as a comprehensive summary of mainstream strategies for regulating the phase distribution to improve PeLED performance.